The Dallas Cowboys were incredibly active in the first week of free agency. They quickly signed Brandon Carr to improve the secondary and Kyle Orton to back up Tony Romo. Then, the Cowboys brought in fullback and guards Lawrence Vickers and Mackenzy Bernadeau and Nate Livings to help blocking.

Now, the second wave of free agency is here. The Cowboys can get more players to revamp their roster. Some of the players available could start, while many others would serve as depth additions. The Cowboys could still stand to sign a couple of starters, even in the secondary.

Follow along to see a few players the Cowboys could sign in this next wave of free agency.

Erik Walden

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The Cowboys are taking a hard look at outside linebacker Erik Walden, who they drafted in the sixth round in 2008, according to the Star-Telegram. Walden played for three teams in his first four years. Playing for the Green Bay Packers last year, Walden took on his first year as a starter.

This is the right time for the Cowboys to take another shot at Walden. He's just starting to come into his own as a pass rusher. He had three sacks and a fumble return for a touchdown, along with 41 tackles.

He played 37 games in his first three seasons, putting up 17 tackles and two sacks.

Joseph Addai

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Joseph Addai would be a nice depth signing at running back for the Cowboys. After being released earlier in March by the Colts, it looks like his starting days are behind him. Last season, Addai ran for 433 yards and a 3.7 rushing average.

Addai was never used to being used as a feature back. He only received more than 250 carries once in his six-year career.

Addai is still a nice runner. He has a career 4.1 yards per carry rate. He seems like he's tapered off in the last couple of years, but he could still be a nice third-string running back.

Sean Jones

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Even after signing Brodney Pool, the Cowboys could use a strong safety they believe is a sure starter. Sean Jones could give Pool a run for his money.

Jones has been a nice safety in his seven-year career. He's started all 16 games in four of the last six years. Last season, he was a strong player for the Tampa Bay Buccaneers, piling up 71 tackles, two fumble recoveries and a sack.